Re: Emacs git repo mangled

[Gerd Möllmann]

> Shall we document this trick? admin/notes/repo is very quiet about
> bisecting in general.

Does something like this suffice?  I don't know at the moment what more 
to say about this.

diff --git a/admin/notes/repo b/admin/notes/repo
index 2185c5a003..a65a87bfc6 100644
--- a/admin/notes/repo
+++ b/admin/notes/repo
@@ -128,6 +128,10 @@ again.
 This is a semi-automated way to find the revision that introduced a bug.
 Browse 'git help bisect' for technical instructions.

+Depending on what you want to do, it can be helpful to use the option
+'--first-parent' with 'git bisect', which makes bisect ignore commits
+coming into a branch from merges.
+
 * Maintaining ChangeLog history

 Older ChangeLog entries are kept in history files named ChangeLog.1,